I agree with regards to Shaun George. I reckon there could be one of 2 reasons for this:
1) As the most experienced, he will be joining Erasmus on field for plenty of test matches against Sri Lanka and then Australia (barring any further Covid disasters of course!)
2) It could be a similar situation to Johan Cloete a few years back. He seemed to get decent appointments as neutral umpire, went to a World Cup and seemed destined for the test arena but then suddenly disappeared from the scene. Maybe something like this might happen to George?